Djokovic Injures Ankle in Lifting Serbia over US in Davis Cup Quarterfinal

BOISE, Idaho - Novak Djokovic wasn't optimistic about his right ankle injury after lifting Serbia to an insurmountable 3-1 lead over the U.S. with a 7-5, 6-7 (4), 6-1, 6-0 win over Sam Querrey in a Davis Cup quarterfinal.